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isprs annals III 3 169 2016

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Figure 1. Concept sketch of neighbourhood definitions used inthis work as basis for extracting features for a considered 3Dical neighbourhoodpoint X: cylindrical neighbourhood definitions Nc and the spher- Nk,opt formed by an optimal number kopt ofnearest neighbours.
Figure 2. Visualisation of the five shape distribution metrics A3, D1, D2, D3 and D4.
Table 4. MCR (in %) for different neighbourhood definitions anddifferent feature sets.
Table 6. Class-wise REC (in %) for different neighbourhood def-initions and different feature sets.

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